#ifndef DES_H
#define DES_H
#include<bitset>

class Des
{
public:
    Des();
    int pc1[56]={57,49,41,33,25,17,9,1,58,50,42,34,26,18,
                10,2,59,51,43,35,27,19,11,3,60,52,44,36,
                63,55,47,39,31,23,15,7,62,54,46,38,30,22,
                14,6,61,53,45,37,29,21,13,5,28,20,12,4};

    int pc2[48]={14,17,11,24,1,5,3,28,15,6,21,10,
        23,19,12,4,26,8,16,7,27,20,13,2,
        41,52,31,37,47,55,30,40,51,45,33,48,
        44,49,39,56,34,53,46,42,50,36,29,32};
    int ip[64]={58,50,42,34,26,18,10,2,
                60,52,44,36,28,20,12,4,
                62,54,46,38,30,22,14,6,
                64,56,48,40,32,24,16,8,
                57,49,41,33,25,17,9,1,
                59,51,43,35,27,19,11,3,
                61,53,45,37,29,21,13,5,
                63,55,47,39,31,23,15,7};

    int ebox[48] = {32,  1,  2,  3,  4,  5,
                    4,  5,  6,  7,  8,  9,
                    8,  9, 10, 11, 12, 13,
                    12, 13, 14, 15, 16, 17,
                    16, 17, 18, 19, 20, 21,
                    20, 21, 22, 23, 24, 25,
                    24, 25, 26, 27, 28, 29,
                    28, 29, 30, 31, 32,  1};

    int sbox[8][4][16] = {
        {
            {14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7},
            {0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8},
            {4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0},
            {15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13}
        },
        {
            {15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10},
            {3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5},
            {0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15},
            {13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9}
        },
        {
            {10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8},
            {13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1},
            {13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7},
            {1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12}
        },
        {
            {7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15},
            {13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9},
            {10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4},
            {3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14}
        },
        {
            {2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9},
            {14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6},
            {4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14},
            {11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3}
        },
        {
            {12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11},
            {10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8},
            {9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6},
            {4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13}
        },
        {
            {4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1},
            {13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6},
            {1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2},
            {6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12}
        },
        {
            {13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7},
            {1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2},
            {7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8},
            {2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11}
        }
    };


    int pbox[32] = {16,  7, 20, 21,
                    29, 12, 28, 17,
                    1, 15, 23, 26,
                    5, 18, 31, 10,
                    2,  8, 24, 14,
                    32, 27,  3,  9,
                    19, 13, 30,  6,
                    22, 11,  4, 25 };

    int ip_1[64]={40, 8, 48, 16, 56, 24, 64, 32,
                  39, 7, 47, 15, 55, 23, 63, 31,
                  38, 6, 46, 14, 54, 22, 62, 30,
                  37, 5, 45, 13, 53, 21, 61, 29,
                  36, 4, 44, 12, 52, 20, 60, 28,
                  35, 3, 43, 11, 51, 19, 59, 27,
                  34, 2, 42, 10, 50, 18, 58, 26,
                  33, 1, 41,  9, 49, 17, 57, 25};

    std::bitset<64> key;
    std::bitset<48> subkey[16];

    void generalkey();
    std::bitset<64> charToBitset(const char s[8]);
    std::bitset<64> encryt(std::bitset<64> &txt);
    std::bitset<64> decryt(std::bitset<64> &txt);
};

#endif // DES_H
